2O4 Albert P. Mathews 



by 1.0135 X io 6 atmospheres. This formula gives a value 

 for "a" somewhat higher than the ordinary formula and it 

 may be that the coefficient should be taken a little lower. 



The theoretical significance of this relationship of cohe- 

 sion to the molecular weight and the number of valences 

 is very interesting, but I shall reserve its consideration for a 

 subsequent paper. 



University of Chicago 



